Furnace protection.



L. L. KNOX,

FURHACE PROTECTION.

APPLICATION FILED IIILY 6,19I4.

l ,1&3 9.2%@ l v .Patented June l5, 191.5.

2 SHEETS-SHEET l.

wITNEssEs :mara-ron i 'g u N' L. L. KNOX.

FUHNACE PROTECTION.

APPLIcAloN FILED JULY 6,1914.

Patented June 15,1915.

2 SHEETS-SHEET 2.

WITN ESSES unrrnp sienne einen@ neuron.

LUTHER L. KNOX, OF AVALON, PENNSYLVANIA, SSIGNOR TD KNX PRESSED WELDED STEEL CGMPAN, F PITTSBURGH, PENNSYLVANIA. A CDRPOBATKGN 0F PENNSYLVANIA.

License.

'FURNCE PROTECTON.

Patenten June 15, i915.

Application filed July 5.151%. Serial No. 5543.155A

T0 all 'whom it may concern.:

Be it known that LUTHER L. KNOX, a

State of Pennsylvania, have invented a new and useful Improvement in Furnace Pro tection. of `which the following is a full, clear, and exact description, reference being had vto the accompanying drawings, forming partl of this specification, in Which- Figure 1 is a front elevation of a furnace having my invention applied thereto. Filq. 2 is a section on the line lL-ll of Fig. 1. Fig. -3 is a section on the line llL-ll of Fig. 1. Fig. 4 is a plan View, Fig. 5 is a front elevation, and Fig. 6 is avertical section of a combined apron and air box.

In the operation ciI n rnaccs, such for instance as sheet and pair rnaces, the Workmen are required to perform certain op erationsin the Way oi manipulating metal being heated through open or partially open furnace doors. lhile performing these operations they are without adequate protection from the intense escaping through the doors.

My invention is designed to provide a Water cooled shield for furnaces of this character. and which is so constructed and arranged that it will form an eliicient means of protection for the Workmen.

My invention also provi( es safety guards or aprons for preventing injury to the Work men from the counterweights employed in the operation of the furnace doors and dempers 'and it also provides a novel `forno of air reservoir in connection with one of these aprons lor guards, whereby the workmen'can hlow air upon themselves es may be ydesired -while at work about the furnace.

In the 'accompanying drawings, I have shown my invention 4as applied to a sheet and pair furnace and the 'arrangement shown will novi' be described@ -2 designates a portion or the Walls of the furnace, 3 the compartment in which the sheets are heatedand thc hea-tinge;` compartment or Side of the furnace.

#-5 is the usual lon' door opening leading linto compartment 3; and 6 is a similar open ing leading into compartment 4.

e-indicates the usual vertically movable doors im' controlling the openings 5 and, 5 to which are attached the counterweigte In accordance with my invention, /provide Water cooledv shields such as shown at 9, these shields being arranged to partially cover the door openings 5 and 6 in front of the doors 7. ll preferably forni each of these shields ci a simple blank of sheetrmetal lient upon itseliE into general U-shape, as shown in Fig. 3, and hai-'infy a top closing flange 19 Welded at one of the upper corners.

1l dit the shield. The shield therefore consists of a closed dat hollow box, which is designed to be filled with water which is circulated therethrough. This Water may be sup v plied by an inlet pipe 12 which is arranged to telescope on a supply pipe 13. In thedrawings I have shown only one oft the shields as provided with a supply connection., the other shield being supplied by the overflow 'from the first shield through a' flexible connecting; hose 15.1. Eachshield is preferably provided with a constantly open vent .15 leading'out of its upper portion to permit the iree escape ci any steam which may be formed. Thesecond shield is also provided with an outlet connection 15n for the heated Water. l

The shields are supported in place in any suitable manner as by the hanger bars 16 which are secured at their upper ends tothe top frame member 17 of the furnace frame.

The shields are set outwardlyaway 'fromthe end of the furnace on the buckstays 18, as best shown in Fig. 2, so as to provide a suiiicicnt space behind the shields and bettjfeen the shields and the doors 7 for the hot air and products of combustion from the furnace to pass upwardly behind the shields. f

In this 'manner the heads and faces of the Workmen are protected.

20 designates counterweights for operat- .ing the usual dempers (not shown). These counterweiggghts are attached to the cablesv21 which pass upwardly and over the wheels or pulleys 22. In order topi-event injury to the Workmen from the counterweights 8 and. 20, secure tothe front of the furnace the hollow aprons 28, 28" and 24. These aprons ino form pockets Within which the counterf Weights Work. The central box 24 between' the two furnace doors is preferably divided into two compartments by a vertical partition The outer compartment 25 is closed except for the provision of an air sup.

i ply pipe 26 and the tire outlet ceimaitions 22 iml at the top. Each of these connections has an f elbow shaped nozzle 28 yrotatably secured therein. he Workman can move either one of these 5 nozzles at any desired angle to cause air to be bloivnuponl .him Wherever desired. The inner compartment 29 of the central apron acts as a pocket for the counterweight 20.

My invention provides means of simple charactenwhich protects the Workmen While 'engaged in the necessary furnace operations.

I claim: l. The combination With a furnace having a doo'i` opening and a vertically movable door for said opening, of a Water cooled shield'supported across the upper portion of l said opening in front of the door: substantially'as described. l f

j2. The combination with a furnace having c a door opening and a vertically movable Vdoor for said opening, of a hollow shield supported across the upper portion of said opening in frontof the door, and means for maintaining` a Water circulation through Said shield; substantially as described.

3. The V{.iombination with a furnace having a door opening and a vertically movable door for saidopening, cfa hollovv shield supported across the upper portion of said 0 opening in front of thedoor, and means for maintaining a' water circulation 7through said shield, said shield being separated -from the end ofl `the furnace to provide a space ,behind it'for thenpwardpassage of hot air 35 'and products of combustion Ae scapii'ig/froin elfurnac'e door subxstantia'll as described. .f 4. The epmbination with a urnacehaving i adjacent door openings and vertically movable doors 'for said openings, of Water cooled shields supported one across the upper portion of each opening in front of said doors,".

a Water supply connection for one of said shields, an outlet connection for the other jshield, and a circulating connection .between the two shields; substantially'as described;

5.' The combination with a furnace havingv` movable parts, .and counterweights for said i parts arranged at the endet the furnace, of aprons inclosing saidfcounterweights vand forming safety pockets thereorggsubstantially as described.A I

6. The combination with a furnace, of an air chamber adjacent thereto, said chamber having a swiveled air discharge nozzle arranged tov discharge air from said -chamber in various directions; substantially as described. v f

Y 7. The combination with the and wan "of" a furnace,of a guard chamber or pocket adjacent thereto, said chamber or pocket hav-V ing two compartments, means for introducing 4or discharging air from one of said coinpartments, andthe other compartment forming a guard pocket for the damper counter- 

